There are a number of glycogen storage diseases - around 10 depending on how they are classified. The differences arise from problems with different enzymes in the process of glycogen production from glucose; each type affects a different enzyme.
Here and
here are a couple of articles which describe the different types, their frequency in the population and the types of tests done for detection.
All are rare to very rare serious inborn errors of metabolism which manifest in very early childhood. If you are thinking this could be your problem, it is extremely unlikely you would have reached adulthood without serious manifestations of the disorder.
Genetic testing is confirmatory after a series of functional tests. There is no one test - each of the potentially defective enzymes must be tested for.
23andme may test for some of these - I don't really know. You would need to search for each gene.
Here is the OMIM entry for the disorders. You would need to look at each type to see what genetic variants are associated with the disorder.